Chuck.



T. J. PEGLEY & G. 0. LEOPULD. CHUCK.

APPLICATION FILED MAE. 4, 1907.

Q, Patented Aug. 24, 1909.

- proved chuck U llTED STATES Pi'lEr-ltf FICF.

THOMAS SYLVANA.

J. lFEGLEY AND GEORGE' 0. LEOPOLD., 0F PHILADELPHIA, PENNSYLVANIA,ASSIGNORS T0 NRTH BRQS MFG CO., 0F PHHfADELP'HA, PENNSYLVANIA, ACRPQRATIGN 0F PENN- CHUCK.

Specification of Letters Eatent.

Application sied March 4, leer," sereine. 360,478.

To all whom 'it may concern:

Be it known that we, 'lnonns J'. Freno/f and Grenen Leonora?, citizenset the United States, r fling;` in Philadelphia, lennsylvania, havy invited certain 'iinproveinents in Chin....r, of "which the follow*- ing isa specification.

The object. of our invention is to siinplitj.vv and cheapen theconstruction of a chuck and to make it in sach a manner thaty itv willreadily and .tirinly g 'asp the drill or other article.

ln the accompanying drawing: Figure l, a longitudinal sectional View ofour iin- Fig. Q, is a sectional view of th" ehnzfli casilig taken on theline 2 2, Fig. l and showing,l the jaws in elevation; Fig. 3, is a taceview of the jaw-carrying disk; Fig. l, is a sectional view through thejaivrarryingdisk on the line sh-4f, Fig. 5; Fig. 5, is a section on theline P-5, Fig. 3; Fig. (i, is a perspective view of the jaw-carryingdisk, and Fig. 7, is a perspective view ot one et the jaws.

A 'is the body of the chuck, A shell having a straight portion and aconical end a, the two parts forming the easing. The

body A has a threaded portion ce on tofV which 1s screwedthe shell A',although the shell may he attached'to the body portion in any suitablemanner.

CAD

B is a disk fitting snugly within the straighty portion of'the shell andresting against the back orn this disk is a screw threaded stein C,which is adapted to a threaded opening a? in the base of the chuck. Theouter end ot' this stein can be shaped in any suitable manner to tit anopening in a drill spindle or other tool to which the chuck ispto beapplied. It. will be noticed that. the

stein is reduced at c back of the threaded port-ion c" and the body A iselongated so as to extend over the threaded portion even when the chuckis inoved out its full extent so as to protect the screw thread c.

Carried by the disk B are three jaws D, in

the present instance, and one of these jaws is provided, shown in Fig.7, with slots Zwei at each side of the base and tapered at the hack d tofit the taper of the shell;

The disk B is hollow, having a back plate and a eonieally hanged frontplate held together loy posts or studs The front plate 2) has in thepresentl instance, three radialvv undercut Slots b2 in whieh the 'jawsl) 'are mounted.

The three posts or stndsZ- in the present in- Astance are'monntefflmidway between the ra dial slots andv carry coiled spi-ii #l end 'Z3 ofeach coiled. springrests. against the liange ot the plate and the otherend extends across a slot.I ,se as to rest against the;` trent of oneotthe jaws. its a resultthe spring tend torce thei'n against the conicalportion of the shell A.

By screwing the stein into the shell, the disk B will be forced by theend o1C the stem toivard the conical port-ion ot' said shell,4

which in tnrn will .torce the jaws toward each other against thepressure of the springs l, closing them upon' the drill or other tool tohe attach-ed to the el ich. By ,reversingr;l the i ovenient ot' thesnell the jaws will he released freni pressure and the springs Williioree thein a rt. i

lt will he s .ii-thatthe parts can be readily and cheaply constructed.By making the dish hollow and nsitf" studs upon which the springs areinonnt l we are enabled to hold the springs in posilininy even when theelnielr ed and, it sary, the jaws can l ot er jaws with f; ditl'erentgiipping sin are can be readily applied.

lty will l1nnderstoial that the hodv and the shell l. which torni theCasin;J olt the ehiy` niej: be' ttaehed one to the other in any suitablelinnn-er, and the diei; may he attached to the thi `Vfaded stein C inseine instances, it d sired.

'We claim:-

l, rlhe eonibination in a elinck or a easing, a threade/fl` steinextending through ay correspondingly threaded portion of said casing, ahollow disk'inounted within i e casing so as to be moved by the steinand having slots, jaws mounted within the disk between the sli 'i andeach having one 'end in engagement, with the jaw of one Slot so as toforce the same outwardly, the casing and the jaws heing` beveled sothatr when said easing is turned relatively to the stein the jaws willbe inoved inv the slots. j

2. The combination of a casing having a threaded opening', aserewthreaded stern extending through the opening in the easing,

the front ot` the easing'lbeing 'conical in- Patented Alle'. 24,1909.

to spread the jews aparte and' @ne i shape, `a hollow disk-having radialundercut slots in the front face', studsl extending from one 'face ofthe diskv to fthe other, coiled springs mounted on each" stud, one endof.'

each coiled spring extending' across theraial slot, jaws mounted .inthe4 radial slots and bearing againstithe springs, .the said jaws beingbeveled at the back to correspond to the taper lof the casing,substantially as described.

3. The combination of a casing made in two parts, consisting Vof a bodyportion vand a shell, there being athreaded 'opening in the bodyportion, a shell having a straight portion .and a conical end, afhollowdiskarranged to move within the straight portion of the shell and havingundercut ra dial slots,- a stem extending through the threadedopening inthe body portion 'andrest-ing against the disk, s rings carried withinthe disk at the sides oi) the slots and each having a por-- tionextending into one of said slots, with 'jaws mounted inthe slots andforced against 4. The combination in av chuck, of a cas' the conicalportion of the shell by said springs having a screw threaded opening inone end and-conical at the .opposite end, a stein extending through thescrew threadedv opening, a dislrinounted in the casing and bear-4 ingagainst the stein, said disk. having undercut slots, jaws mounted inthe' undercut slots,

the disk being made hollow and consisting of two plates, one having aflange `in which the slots are cut., studs extending from one ing acrossone of .the radial slots, substantially 'as described.

5. In a carryingdisk for chucl s,the coni- .bination of the front platehaving aconical flange, and provided with radialjslots, a back plate,.posts securing one plate to the other, springs on the posts, an end ofeach spring extending across aradial slot, substantially yas described.

ntestinion'y whereof, we'have signed our naines to this specification,1n the presence of two subscribing witnesses.

Witnesses: vJos. H. KLEIN, WM. A. BARR.

